books.google.com - The origin ofthe International Acoustical Imaging Symposium series can be traced to 1967, when a meeting on acoustical holography was held in C alifornia. In those days, acoustical holography was at the leading edge of research but, as the importance of this subject waned, so the title of the series...http://books.google.com/books/about/Acoustical_Imaging.html?id=BcmIKVxvrCAC&q=plane&utm_source=gb-gplus-shareAcoustical Imaging